Dual frequency sound absorption with an array of shunt loudspeakers.

Zhang, P; Cong, C; Tao, J; Qiu, X

Dual frequency sound absorption with an array of shunt loudspeakers.

Zhang, P Cong, C Tao, J Qiu, X

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Publisher:: NATURE PUBLISHING GROUP
Publication Type:: Journal Article
Citation:: Scientific reports, 2020, 10, (1), pp. 10806
Issue Date:: 2020-07-02

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Field	Value	Language
dc.contributor.author	Zhang, P
dc.contributor.author	Cong, C
dc.contributor.author	Tao, J
dc.contributor.author	Qiu, X https://orcid.org/0000-0002-5181-1220
dc.date.accessioned	2020-08-06T00:32:54Z
dc.date.available	2020-05-29
dc.date.available	2020-08-06T00:32:54Z
dc.date.issued	2020-07-02
dc.identifier.citation	Scientific reports, 2020, 10, (1), pp. 10806
dc.identifier.issn	2045-2322
dc.identifier.issn	2045-2322
dc.identifier.uri	http://hdl.handle.net/10453/141978
dc.description.abstract	Transformer noise is dominated by low frequency components, which are hard to be controlled with traditional noise control approaches. The shunt loudspeaker consisting of a closed-box loudspeaker and a shunt circuit has been proposed as an effective sound absorber by storing and dissipating the electrical energy converted from the incident sound. In this paper, an array of shunt loudspeakers is proposed to control the 100 Hz and 200 Hz components of transformer noise. The prototype under tests has a thickness of 11.8 cm, which is only 1/28 of the wavelength of 100 Hz. The sound absorption performance of the array under random incidence is analyzed with the parallel impedance method, and the arrangement of array elements is optimized. The test results in a reverberation room show that the proposed array has sound absorption coefficients of 1.04 and 0.93 at 100 Hz and 200 Hz, respectively, which provides potential of applying this type of thin absorbers for low-frequency sound control.
dc.format	Electronic
dc.language	eng
dc.publisher	NATURE PUBLISHING GROUP
dc.relation.ispartof	Scientific reports
dc.relation.isbasedon	10.1038/s41598-020-67810-z
dc.rights	info:eu-repo/semantics/openAccess
dc.title	Dual frequency sound absorption with an array of shunt loudspeakers.
dc.type	Journal Article
utslib.citation.volume	10
utslib.location.activity	England
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Mechanical and Mechatronic Engineering
pubs.organisational-group	/University of Technology Sydney
utslib.copyright.status	open_access	*
dc.date.updated	2020-08-06T00:32:43Z
pubs.issue	1
pubs.publication-status	Published
pubs.volume	10
utslib.citation.issue	1

Abstract:

Transformer noise is dominated by low frequency components, which are hard to be controlled with traditional noise control approaches. The shunt loudspeaker consisting of a closed-box loudspeaker and a shunt circuit has been proposed as an effective sound absorber by storing and dissipating the electrical energy converted from the incident sound. In this paper, an array of shunt loudspeakers is proposed to control the 100 Hz and 200 Hz components of transformer noise. The prototype under tests has a thickness of 11.8 cm, which is only 1/28 of the wavelength of 100 Hz. The sound absorption performance of the array under random incidence is analyzed with the parallel impedance method, and the arrangement of array elements is optimized. The test results in a reverberation room show that the proposed array has sound absorption coefficients of 1.04 and 0.93 at 100 Hz and 200 Hz, respectively, which provides potential of applying this type of thin absorbers for low-frequency sound control.

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http://hdl.handle.net/10453/141978